Vibration damping mounting



May 3l, 1949. l.. F. THIRY VIBRATION DAMPING MOUNTING Filed Dec, 4, 1944 R. OY.

Mm *A F uw Patented May 31, 1949 UNITED STATES PTENT OFFICE VIBRATION DAMPIN G MOUNTING Leon F. Thiry, Montclair, N. J., assignor to The General Tire & Rubber Company, Akron, Ohio, a corporation of h10 Application Decemberd, 1944, Serial Nol 566,418

'cushion and in which adjustable bushing engaging elements are provided by means of which the deection characteristics of the bushing may be varied.

A further object of the invention is to provide stops for limiting the amplitude of the movement of the cushioned element in either direction axially of the bushing.

Another object of the-invention is to provide movement limiting stops that have elastic snub- 4 blng cushions for absorbing impact shocks.

A further object oi' the invention is to provide means for simultaneously adjusting the bushingengaging and movement limiting elements in such manner that the range of movement permitted in either direction may be increased or decreased simultaneously with a decrease or increase in the stiffness of the cushion.

With the above and other objects inview, the invention may be said to comprise the mounting as illustrated in the accompanying drawings, hereinafter described and particularly set forth in the appended claims, together with such variations and modifications thereof as will be apparent to one skilled in the art to which the invention pertains.

Reference should be had to the accompanying drawings forming a part of this specication, in which:

Fig. 1 is a top plan view of a mounting embodying the invention, and

Fig. 2 is a vertical section taken on the line indicated at 2-2 in Fig. 1.

In the accompanying drawings, a mounting embodying the invention is shown applied to a ilxed panel I that is provided with an opening 2 to receive a supporting sleeve 3 that is disposed with its axis at right angles to the panel and provided with a peripheral attaching ilange 4 secured to the panel I by means of bolts 5. The sleeve 3 is provided with short inturned ilanges f8 at its opposite ends and a post 1 extends centrally through the sleeve, the post 1 being resiliently supported by means of an elastic rubber bushing 8 that is confined between the post l and the interior of the sleeve I.

s claims. (ci. 24a-35s) 2 The length of the bushing 8 is such that it tits between the inturned ilanges 6 of the sleeve and the bushing 8 is preferably held under radial compression between the post 'l and the sleeve 3. The bushing 8 may be assembled with the post and sleeve by the method disclosed in my Patent 1,782,770, November 25, 1930. The post 1 has spaced threaded portions 9 and I0 which receive internally threaded collars II and I2. Each col-` lar has a body portion I3 of an external diamev ter that is less than the internal diameter of the sleeve ilanges 6, and a tapered externally beveled inner end I4 which engages with an end of the bushing 8 adjacent the periphery of the post and radially inwardly of the ilanges 6 of the sleeve.-

Each of the collars is also provided with a peripheral flange I5, the flanges I5 of the collars overlying opposite ends of the sleeve 3 and being normally spaced axially from the ends of the sleeve so as to provide stops for limiting the amplitude of movement of the post with respect to the sleeve.

AV supporting plate I8 may be attached to one of the collars and lupon this plate the instrument to be cushioned against vibration may be mounted.

The collars II and I2 may be adjusted independently toward or away from an end of thebushing 8 to apply axial pressure to the bushing and to restrict the annular opening between the ange 8 and the collar. By adjusting a tapering end Il toward an end of the bushing 8. the resistance of the bushing to movements ot the post in a direction to carry the collar so adjusted into the sleeve may be increased. yIl.' desired the. resistance to movement in one direction may be made greater than resistance to movement in the other direction by advancing one collar toward the bushing and retracting the other collar. The adjustment of each collar on the post also varies the space between the end of the sleeve 8 and the stop ilange I5 of the collar so that the range of movement permitted is decreased when the stinness of the cushion is increased, and increased when the stiffness of the cushion is decreased. In order to cushion the impact of the ilanges Il against the ends'ot the sleeve 3, snubbing washers I1 formed o! elastic material such as rubber, are preferably mounted upon the inner faces oi' the ilanges I5.

It will be apparent that the mounting of the present invention provides a simple and eilicient vibration damping support for instruments that are mounted upon a panel or other support that is subject to vibrations and that the deectlon characteristics of the mounting can be readily adjusted to suit the conditions of service. v

It is to be understood that variations and modications of the specific device herein shown and described for purposes of illustration, may be made without departing from the spirit of the invention.

WhatIclaimis f 1 1. A vibration damping support comprising a sleeve having an external attaching ange inter-` mediate its ends and inturned anges at its ends defining end openings in the sleevefalvpost extending -through the sleeve coaxial therewith and having spaced externally 'threaded portions, a bushing of elastic rubber confined under`radial compression between the post and sleeve, said bushing being engaged at its opposite ends by- 4 therefrom, and snubbing cushions interposed be. tween said sleeves and flanges.

4. A vibration damping support comprising a sleeve, a post extending axially through the sleeve, a bushing of elastic rubber conilned between the post and sleeve, two axially adjustable collars mi' 'Sleeve a post extending centrally through 511 L sleeve, a bushing of elastic material confined under radial compression between the sleeve and post, two collars on said post provided with pesaid inturned ilanges of the sleeve and engaging the post between the threaded portions thereof,- i

and an internally threaded collar screwed upon each threaded portion ofthe post, said collars having externally beveled tapering end faces extending nto the end openings of the sleeve a'nd engaging opposite ends of the bushing adjacent the post and being independently adjustable axially of the post to vary the deflection char' acteristics of the bushing.

2. A vibration damping support comprising a sleeve, a post extending through the sleeve,a bushingr of elastic rubber'confined between the post and sleeve and two collars on vsaid post, each having an externally beveled tapering inner end engaging said bushing adjacent the post and radially inwardly of said sleeve and radially projecting portions outwardly of said tapering ends that overlie opposite ends of said sleeve and limit axial movements of said post, said collars being independently adiust-able axially 4"of said post to vary the deflection characteristics of said bushing.

' 3. A vibration damping support comprising a sleeve, a post extending axially through the sleeve, a bushing of elastic rubber confined between the post and sleeve, two axially adjustable' collars on said post, each having a tapering inner end en;- gaging an end of the bushing radially inwardly of'the sleeve and a peripheral ilange overlying an end of the sleeve and normally spaced axially ripheral anges overlying and normally spaced axially from opposite ends of said sleeve, and snubbing cushions of elastic material mounted upon the inner faces of said anges.

6. A vibration damping supportcomprising a sleeve, a post extending centrally through the sleeve, a bushing of elastic material conilned underradial compression between the sleeve and post, two collars on said post provided with peripheral ilanges overlying and normally spaced axially from opposite ends of said sleeve, said collars being adjustable axially of the post, and snubbing cushions of elastic material mounted upon the inner faces of said flanges.

. LEON F. '.I'HIRY.-

REFERENCES CITED The following references are of record in the file of this patent:

UNTTED STATES PATENTS Great Britain May 7, 1936 

